Marc Segal

Marc S. Segal


Marc S. Segal is a member of Ballard Spahr's Intellectual Property Litigation Group. In addition to litigation, Marc's practice encompasses intellectual property counseling, infringement, validity, and freedom to operate opinions, and licensing.

Marc is an experienced litigator in matters involving patents, trademarks, copyrights, licensing disputes, and trade secrets, for clients in industries such as pharmaceuticals, diagnostic tests, medical devices, drug delivery systems, and computer hardware and software. Marc also has experience defending pharmaceutical companies from antitrust claims alleging baseless patent litigation under the Hatch-Waxman Act. He has experience in all aspects of intellectual property litigation from pre-trial investigations through trial, and appeals. Marc also has extensive experience with inter partes review and post grant review proceedings, including appeals thereof.

Before entering private practice, Marc worked in biopharmaceutical manufacturing and development at SmithKline Beecham, now GlaxoSmithKline.


Representative Matters

  • Defend a global nutrition and biosciences company in a patent infringement suit brought in the District of Delaware for alleged infringement for the manufacture, use, and sale of an enzyme additive for animal feed products.
  • Represent a DNA sequencing company in litigation in the District of Delaware, and in related inter partes review proceedings before the Patent Trial and Appeal Board of the U.S. Patent and Trademark Office
  • Defended a global biopharmaceutical company in patent infringement litigation brought in the Eastern District of Texas for alleged infringement of a patent directed to recombinant DNA technology

Professional Highlights

Professional Activities

Philadelphia Intellectual Property Law Association



University of Pennsylvania Law School (J.D. 1999, magna cum laude)
Member, Moot Court Board; Member, Journal of Labor and Employment Law; Member, Order of the Coif; Recipient, P. Pemberton Morris Prize, awarded for student with highest grades in areas of evidence, pleading, and practice

Drexel University (M.S., biological sciences, molecular biology, and molecular genetics, 1994)

Pennsylvania State University (B.S., biology, 1989, with honors)



U.S. District Court for the District of New Jersey

U.S. District Court for the Eastern District of Pennsylvania

U.S. Court of Appeals for the Federal Circuit

U.S. Patent and Trademark Office